Author's Organization:Department of Veterinary Medicine, Obihiro University of Agriculture and Veterinary Medicine Department of Veterinary Medicine, Obihiro University of Agriculture and Veterinary Medicine Department of Veterinary Medicine, Obihiro University of Agriculture and Veterinary Medicine Department of Veterinary Medicine, Obihiro University of Agriculture and Veterinary Medicine
Published: December 15, 1990Received: April 24, 1990Available on J-STAGE: February 14, 2008Accepted: August 02, 1990
Advance online publication: -
Revised: -